Hitachi Microcomputer System Ltd.
78Patents
0Active
78Granted
41Portfolio score
Filing activity: Mar 26, 1990 → Dec 24, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5572678A | System for sending frames from sender to receiver using connectionless protocol and receiving acknowledging frame and retransmission request frame from receiver using connection oriented protocol | Electricity | 115 | Expired |
| US6182742A | Cooling apparatus for use in an electronic system | Electricity | 89 | Expired |
| US6249532A | Interactive chargeable communication system with billing system therefor | Electricity | 79 | Expired |
| US5384516A | Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source or from a battery | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5714405A | Semiconductor device | Emerging Cross-Sectional Technologies | 70 | Expired |
| US5241465A | Method for determining optimum schedule in computer-aided scheduling system | Physics | 70 | Expired |
| US5378656A | Leadframe, semiconductor integrated circuit device using the same, and method of and process for fabricating the same | Emerging Cross-Sectional Technologies | 68 | Expired |
| US5530965A | Multiply connectable microprocessor and microprocessor system | Physics | 67 | Expired |
| US6032266A | Network system having function of changing route upon failure | Electricity | 65 | Expired |
| US6112174A | Recognition dictionary system structure and changeover method of speech recognition system for car navigation | Physics | 64 | Expired |
| US6148411A | Network system having function of changing route upon failure | Electricity | 63 | Expired |
| US5637913A | Leadframe semiconductor integrated circuit device using the same and method of and process for fabricating the two | Emerging Cross-Sectional Technologies | 60 | Expired |
| US5896025A | Secondary battery protection device from overcharge/overdischarge | Electricity | 59 | Expired |
| US5313630A | System of object oriented inheritance using the temporal status of superclasses | Emerging Cross-Sectional Technologies | 57 | Expired |
| US5682545A | Microcomputer having 16 bit fixed length instruction format | Physics | 54 | Expired |
| US5568628A | Storage control method and apparatus for highly reliable storage controller with multiple cache memories | Physics | 51 | Expired |
| US5524175A | Neuro-computer system for executing a plurality of controlling algorithms | Physics | 51 | Expired |
| US5303144A | Computer aided planning support system | Physics | 50 | Expired |
| US5689814A | Radio communication apparatus with expanded dynamic range | Electricity | 49 | Expired |
| US5583375A | Semiconductor device with lead structure within the planar area of the device | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5874773A | Lead frame having a supporting pad with a plurality of slits arranged to permit the flow of resin so as to prevent the occurrence of voids | Electricity | 45 | Expired |
| US5568083A | Semiconductor integrated circuit device having an internally produced operation voltage matched to operation speed of circuit | Physics | 44 | Expired |
| US5904556A | Method for making semiconductor integrated circuit device having interconnection structure using tungsten film | Electricity | 40 | Expired |
| US5519874A | Application execution control method and system for servicing subscribers via a switchboard connected to a computer using an application management table | Electricity | 40 | Expired |
| US6476467B2 | Semiconductor device and process for producing the same | Electricity | 37 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.